WO2024046917A1 - Clapet antiretour - Google Patents

Clapet antiretour Download PDF

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Publication number
WO2024046917A1
WO2024046917A1 PCT/EP2023/073413 EP2023073413W WO2024046917A1 WO 2024046917 A1 WO2024046917 A1 WO 2024046917A1 EP 2023073413 W EP2023073413 W EP 2023073413W WO 2024046917 A1 WO2024046917 A1 WO 2024046917A1
Authority
WO
WIPO (PCT)
Prior art keywords
check valve
piston
outlet
valve according
inlet
Prior art date
Application number
PCT/EP2023/073413
Other languages
German (de)
English (en)
Inventor
Alexander Müller
Beat Schmid
Agim GASHI
Original Assignee
Eugen Seitz Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eugen Seitz Ag filed Critical Eugen Seitz Ag
Publication of WO2024046917A1 publication Critical patent/WO2024046917A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/005—Particular materials for seats or closure elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/037—Quick connecting means, e.g. couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/043—Methods for emptying or filling by pressure cascade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/065—Fluid distribution for refueling vehicle fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0139—Fuel stations

Definitions

  • the present invention relates to a check valve, in particular a check valve of a hydrogen refueling system, and a unit of a hydrogen refueling system.
  • a hydrogen refueling system in particular a hydrogen filling station, has one or more pressure tanks in which liquid or compressed gaseous hydrogen is provided for refueling motor vehicles or railways.
  • the pressure tanks are also called banks or storage banks.
  • the hydrogen is obtained one after the other from several storage banks.
  • the pressures in the individual storage banks are therefore different, usually they are 350 bar, 500 bar, 700 bar and 1000 bar. However, memory banks with other pressures are also possible.
  • High-pressure valves especially pilot-controlled solenoid valves, enable fast switching times and therefore quick changing of the memory bank.
  • the switching times are between 10 ms and 200 ms.
  • Check valves prevent hydrogen from flowing back from a dispensing line connected to the vehicle tank to the storage bank.
  • the rapid opening of the storage banks leads to high pressure surges or pressure pulses in the storage bank line. These high pressure surges can... Damage the check valve of the storage bank downstream of the flow direction.
  • the sealing element can be moved in the direction of flow so that the check valve no longer closes.
  • the check valve also experiences high pressure surges or pressure pulses in the counterflow direction. These pressure surges are caused by the increase in pressure in the line. Solenoid valves usually close more slowly than they open. This means that the check valve of a first or upstream storage bank is not yet completely closed when a solenoid valve of a second or subsequent storage bank is already completely open.
  • the pressure surge acting on the check valve closes the check valve with a relatively large force. Its piston is often pressed into the sealing seat with great force. On the one hand, this massively reduces the service life of the check valve. The sealing seat can even be damaged so that the check valve no longer closes optimally. This limits the maximum pressure that can exist in a memory bank.
  • DE 10 2016 014 312 A1 discloses a check valve with a piston made of PEEK (polyetheretherketone), which is penetrated by oblique channels. It is used in particular in piston pumps and compressors. Check valves are also known, the pistons of which the fluid flows around. However, they are not protected against kickbacks and are therefore not suitable for pressures such as those found in hydrogen refueling systems.
  • PEEK polyetheretherketone
  • the check valve according to the invention has an inlet and an outlet which define a flow direction which extends from the inlet to the outlet.
  • the check valve has a piston arranged movably relative to the inlet and outlet for opening and closing the inlet of the check valve.
  • the piston defines a piston axis with a first end facing the inlet and a second end facing the outlet.
  • the piston has an outer surface along which a fluid flowing in the direction of flow flows through the check valve.
  • the outlet has outlet channels in order to allow the fluid to flow out of the check valve, with all outlet channels of the outlet running obliquely, i.e. at an angle not equal to 0°, to the piston axis.
  • the check valve is suitable for various applications, especially for applications with high pressure pulses in the countercurrent direction.
  • the check valve is particularly suitable for use in a hydrogen refueling system, in particular in a hydrogen filling station for motor vehicles.
  • the check valve can be used particularly at pressures of up to 1000 bar and more. Thanks to the increased service life of the check valve, maintenance intervals and maintenance costs of a system, especially a hydrogen refueling system, are reduced. Failures of such systems are reduced or avoided.
  • Other areas of application include hydrogen tank trucks and electrolysers for producing hydrogen.
  • the check valve according to the invention is also suitable for retrofitting systems because it is relatively space-saving and simple.
  • the piston Preferably there is a complete flow around the piston, i.e. no portion of the fluid flows through the piston.
  • no portion of the fluid flows through the piston.
  • the piston in an open position of the piston, only one channel is released, which extends from the entrance to the exit and which extends exclusively along the outer surface of the piston.
  • the piston only opens a channel between the inlet and outlet, which extends along the outer surface of the piston. This optimizes the damping of the piston when opening and closing the valve and enables a high flow rate in the direction of flow from the inlet to the outlet.
  • the piston can be made robust and therefore long-lasting because it is not penetrated by any channels that could weaken it.
  • the piston is preferably movable in a guided manner.
  • the piston has radially projecting ribs on its circumference, with the outer surface along which the fluid flows preferably being arranged between the ribs. These ribs minimize turbulence in the fluid flow. They preferably guide the piston in its movement.
  • at least one of the ribs is mounted in the valve body.
  • the check valve preferably has a valve body in which the piston is movably arranged, the piston being movable guided by the valve body. If ribs are present on the piston, they preferably extend to the inner wall of the valve body in order to guide the piston and direct the fluid. Depending on the embodiment, at least one of the ribs, preferably all ribs, are mounted in the valve body.
  • outlet channels Preferably there are as many outlet channels as there are surfaces between the ribs. This optimizes fluid flow along the piston.
  • the valve body preferably has a sealing seat on which the piston rests when the check valve is closed, the sealing seat preferably being made of metal.
  • An elastomeric seal such as an O-ring, is preferably not present on either the seal seat or the piston.
  • the piston preferably seals without an elastomeric seal.
  • At least part of the piston is made of a plastic, in particular of a high-performance plastic and preferably of PEEK.
  • the entire piston is preferably made of plastic, in particular of a high-performance plastic and preferably of PEEK.
  • the damping properties of the piston are thereby increased.
  • the piston has a relatively low weight. The moving mass of the check valve is reduced. The opening and closing speed as well as the impact resistance are increased. An additional elastomeric sealing element between the piston and the sealing seat can be omitted.
  • the sealing seat is made of metal, the sealing effect is optimized when using a piston made of plastic, especially PEEK.
  • High-performance plastics, especially PEEK are stable in a very wide temperature range, which is both negative and positive °C. This makes the check valve ideal for long-term use with hydrogen.
  • a coupling element which is attached to a housing of the check valve, the coupling element having through openings which form the outlet channels.
  • This allows the flow in the direction of flow from the check valve through the outlet channels to be maximized. This is particularly optimal for hydrogen refueling systems as the refueling time can be minimized. Pressure losses are minimized thanks to outlet channels with large diameters.
  • the piston is preferably guided in the valve body and spaced from it Coupling element arranged.
  • the coupling element can be designed, for example, as a hollow screw that can be screwed into the housing or onto the housing. This makes assembly easier.
  • the valve body preferably forms the housing of the check valve.
  • a return spring is preferably present which presses the piston into a sealing seat in order to close the check valve.
  • the return spring is preferably arranged with a first end in the piston and with a second end in the coupling element.
  • the return spring is arranged in the piston, being surrounded by the outlet channels. This is an extremely compact arrangement so that the size of the check valve is minimized.
  • the unit according to the invention of a hydrogen refueling system has a first line for connecting a first storage bank to a dispensing line and a second line for connecting a second storage bank to the same dispensing line.
  • One filling direction leads from the first storage bank and the second storage bank to the dispensing line.
  • a first high-pressure valve, in particular a pilot valve-controlled solenoid valve, and a first check valve are arranged in the first line, the first check valve being arranged downstream of the first high-pressure valve in the filling direction.
  • a second high-pressure valve, in particular a pilot valve-controlled solenoid valve, and a second check valve are arranged in the second line, the second check valve being arranged downstream of the second high-pressure valve in the filling direction.
  • the first check valve and the second check valve are check valves as described above.
  • the filling direction is preferably the above-mentioned flow direction through the check valve.
  • Figure 1 is a schematic representation of a unit of a hydrogen refueling system
  • Figure 2 is a perspective view of a check valve according to the invention with an inlet and an outlet line;
  • Figure 3 shows a longitudinal section through the check valve according to Figure 2 in the closed state
  • Figure 4 shows a further longitudinal section through the check valve according to Figure 2 in the closed state
  • Figure 5 shows a longitudinal section through the check valve according to Figure 2 in the open state
  • Figure 6 is a first perspective view of a piston of the check valve according to Figure 2;
  • Figure 7 shows a first view of an end face of the piston according to Figure 6;
  • Figure 8 shows a second perspective view of the piston according to Figure 6;
  • Figure 9 shows a second view of an end face of the piston according to Figure 6;
  • Figure 10 is a side view of the piston according to Figure 6;
  • Figure 11 shows a first perspective view of a coupling element of the check valve according to Figure 2;
  • Figure 12 shows a first view of an end face of the coupling element according to Figure 11;
  • Figure 13 shows a second perspective view of the coupling element according to Figure 11;
  • Figure 14 shows a second view of an end face of the coupling element according to Figure 11 and
  • Figure 15 is a side view of the coupling element according to Figure 11.
  • a gas station with two storage banks B1, B2 for hydrogen is shown schematically in FIG. There are usually three, four or more memory banks B1, B2 per tap.
  • the individual hydrogen storage banks B1, B2 have different pressures.
  • the pressures are preferably 350 bar, 500 bar, 700 bar and 1000 bar.
  • the first memory bank B1 has a lower pressure than the second memory bank B2.
  • a feed line 20 leads from each memory bank B1, B2 via valves HV1, HV2, CV1, CV2 to an intermediate line 21 and then to a common tap line 22, which leads to a tap point, not shown. This is the filling direction when refueling a motor vehicle, also not shown, and the direction of flow through the valves HV1, HV2, CV1, CV2.
  • the supply line 20, the intermediate line 21 and the dispensing line 22 are preferably metal pipes. Preferably they are stiff.
  • FIG. 1 Not shown in Figure 1 are a cryopump connected to the storage banks B1, B2 or a compressor for compressing the hydrogen as well as the filling points connected to the storage banks B1, B2 via the filling line 22, also called filling pumps, at which the motor vehicles can be refueled with hydrogen .
  • a cryopump connected to the storage banks B1, B2 or a compressor for compressing the hydrogen as well as the filling points connected to the storage banks B1, B2 via the filling line 22, also called filling pumps, at which the motor vehicles can be refueled with hydrogen .
  • Each memory bank B1, B2 is assigned a high-pressure valve HV1, HV2, preferably a pilot-controlled solenoid valve.
  • HV1, HV2 preferably a pilot-controlled solenoid valve.
  • an associated check valve CV1, CV2 is arranged downstream of the high-pressure valve HV1, HV2.
  • the check valve CV1, CV2 opens when pressure is applied in the flow direction towards the tap line 22 and prevents a fluid flow in the opposite direction, i.e. it prevents a backflow towards storage banks B1, B2.
  • hydrogen is first drawn from the storage bank with the lowest pressure, in this example from the first storage bank B1.
  • the associated first high-pressure valve HV1 is opened, as a result of which the associated first check valve CV1 also opens due to the pressure of the fluid flow in the flow direction, here hydrogen.
  • the second solenoid valve HV2 and thus also the second check valve CV2 are closed.
  • the fluid, here hydrogen flows from the first storage bank B1 via the supply line 20 and the intermediate line 21 to the tap line 22 and thus to the tap point.
  • the system switches to the second storage bank B2, which has a higher pressure.
  • the first high-pressure valve HV1 is therefore closed and the second high-pressure valve HV2 and thus also the second check valve CV2 are opened. Since the first solenoid valve HV1 and/or the first check valve CV1 close more slowly than the other valves open, the now increased pressure in the intermediate line 21 acts on the not yet completely closed first check valve CV1.
  • This pressure surge accelerates the closing element of the check valve CV1, usually a piston, so that it hits the sealing seat at high speed. As mentioned at the beginning, this can damage the check valve or at least massively shorten its lifespan.
  • Figures 2 to 5 show an example of a check valve CV according to the invention, which can be used in the arrangement according to Figure 1 as a first and second check valve CV1, CV2. However, it can also be used in other areas in which good damping of the piston movement or a gentle piston movement is advantageous at least in the flow direction and/or in the counterflow direction.
  • the valve can also be used for other fluids and in other systems.
  • the check valve CV has a valve body 1, which forms a housing of the check valve CV.
  • the valve body 1 is preferably formed in one piece. It is preferably made of metal, especially steel.
  • a coupling element 3 is held on or in the valve body 1.
  • the coupling element 3 is designed as a hollow screw and is screwed in via an external thread 31 to an end of the valve body 1 on the outlet side in the flow direction.
  • the coupling element 3 has a base body 30 and a flange 32, the flange 32 preferably resting on the outer end face of the valve body 1.
  • the coupling element 3 has an internal thread 320, preferably in the area of the flange 32.
  • a circumferential inclined edge 321 is preferably formed, which forms a cone that tapers in the counterflow direction.
  • the intermediate line 21 forms an outlet line of the check valve CV. It is connected to the valve body 1 via a first connecting element 4 with an external thread 40 and a first bushing 80 with an internal thread 81. In this example it is connected to the coupling element 3 for this purpose.
  • the intermediate line 21 preferably rests on the circumferential inclined edge 321 and is therefore, on the one hand, secured against rotation and held fixed in the longitudinal direction.
  • the intermediate line 21 leads to the tap. It is therefore arranged on the output side of the check valve CV.
  • the supply line 20 is connected to the valve body by means of a second connecting element 5 with an external thread 50 and to the valve body 1 by means of a second socket 82 with an internal thread 83.
  • the supply line 20 forms an inlet line of the check valve CV.
  • the valve body 1 also has a circumferential inclined edge 10 in the interior, which now forms a cone that tapers in the direction of flow. The supply line 20 rests on this inclined edge 10 and is therefore secured against rotation and held fixed in the longitudinal direction.
  • a return spring 7 is arranged between the piston 6 and the coupling element 3. It is inserted with one end into a receiving opening 620 of the piston 6 and with another end into a receiving opening 36 of the coupling element 3 or held in this. It extends centrally and in the direction of the piston axis 63, which can be seen in Figure 10.
  • FIG 3 the check valve CV is shown in the closed state, in Figure 5 in the open state.
  • the direction of flow through the opened valve is shown with arrows in Figure 5.
  • a fluid flowing through preferably hydrogen, flows around the outer surface of the piston 6 and flows between the piston 6 and the inner wall of the valve body 1 through outlet channels 35 of the coupling element 3.
  • the outlet channels 35 run obliquely, ie at an angle to the piston axis 63.
  • the outlet channels 35 open into a common chamber 38, which is connected to the lumen of the intermediate line 21, so that the fluid can flow out of the check valve CV.
  • the piston 6 is shown in detail in Figures 6 to 10. It is preferably made from a high-performance plastic and even more preferably from PEEK.
  • the piston 6 seals without a sealing ring or further seal in the sealing seat 11 of the valve body 1.
  • the sealing seat 11 is preferably made of steel or another metal. Alternatively, it is made of a different material that is harder than the material of the piston 6.
  • the piston 6 has a base body 60 with a first and a second end.
  • the first end has an end piece 62 with a receiving opening 620 in the form of a blind hole.
  • the end piece 62 is frustoconical and the receiving opening 620 is circular. Other forms are possible.
  • the receiving opening 620 serves to receive the return spring 7, as can be clearly seen in Figures 3 and 5.
  • the opposite end face 600 is closed and preferably flat. This end is conical and tapers towards the free end face 600. This end face 600 and/or its adjacent conical area form the sealing area for closing the check valve CV. When the valve is closed, the piston 6 rests with this sealing area on the widening sealing seat 11. This can be clearly seen in Figures 3 and 4.
  • Ribs 61 protrude radially from the base body 60. They extend parallel to the piston axis 63. They preferably extend approximately over the entire length of the base body. In this example, there are five ribs 61, matching the five outlet channels 35 of the coupling element 3. Between the ribs, the base body 60 forms the outer surfaces along which the fluid flows. The number of intermediate surfaces is therefore preferably the same as the number of outlet channels 35. The outlet channels 35 are preferably aligned with the surfaces lying between the ribs 61.
  • a different number of ribs 61 and outlet channels 35 are also possible. There can also be different numbers of ribs 61 compared to the outlet channels 35.
  • the ribs 61 preferably extend to the inner wall of the valve body 1.
  • the piston 6 can thus be moved in a guided manner along the piston axis 60 within the valve body 1.
  • the piston 6 is arranged in the valve body 1 so that it can rotate about its piston axis. In other embodiments, it is arranged in the valve body 1 so that it cannot rotate.
  • the piston 6 is mounted in the valve body 1 with at least one rib 61.
  • the coupling element 3 is shown in detail in FIGS. 11 to 15. It is preferably made of metal or a high-performance plastic. It has a cylindrical base body 30, which has the external thread 31 and the adjoining flange 32 at one end. The internal thread 320 is arranged in the flange 32. At the opposite end, the base body 30 preferably has a step-shaped tapered region 33, which is followed by an end piece 34 with a smaller diameter. The outlet channels 35 are arranged in the base body 30 and/or in the tapered area, as can be clearly seen by looking at FIGS. 14 and 3 together.
  • a sealing ring 9 seals the coupling element 3 in the tapered area 33 from the valve body 1, as can be seen in Figure 3. This sealing ring 9 is preferably the only sealing ring and is located between two static components.
  • a vent opening 37 is present in Figures 12 and 14. It leads through the valve body 1 to the outside and enables, for example, the sealing points to be checked.
  • the check valve according to the invention can be used for high pressures and enables gentle closing even when the pressure effect is reversed.
  • Coupling element base body 7 return spring external thread flange 80 first socket
  • HV1 first high pressure valve first connecting element HV2 second high pressure valve external thread CV1 first check valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

Un clapet antiretour, en particulier d'un système de ravitaillement en hydrogène, comporte une entrée et une sortie qui définissent une direction d'écoulement qui s'étend de l'entrée à la sortie. Le clapet antiretour comprend un piston (6), qui est agencé de telle sorte qu'il peut se déplacer par rapport à l'entrée et à la sortie, pour ouvrir et fermer l'entrée du clapet antiretour, le piston (6) définissant un axe de piston (63) avec une première extrémité faisant face à l'entrée et une seconde extrémité faisant face à la sortie. Le piston (6) a une surface externe le long de laquelle s'écoule un fluide s'écoulant à travers le clapet antiretour dans la direction d'écoulement. La sortie comporte des canaux de sortie (35) pour permettre au fluide de s'écouler vers l'extérieur hors du clapet antiretour, tous les canaux de sortie (35) de la sortie s'étendant obliquement par rapport à l'axe de piston (63). Le clapet antiretour peut être utilisé pour des pressions élevées et permet une fermeture douce même avec une inversion de l'action de pression. En particulier, il peut être utilisé dans des stations de remplissage d'hydrogène.
PCT/EP2023/073413 2022-08-30 2023-08-25 Clapet antiretour WO2024046917A1 (fr)

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EP22192910 2022-08-30
EP22192910.2 2022-08-30

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256137A (en) * 1979-03-19 1981-03-17 Launay Paul De Check valve
GB2159248A (en) * 1984-05-23 1985-11-27 Bossini Bortolo & Figli Srl Non-return valve
CA2678983A1 (fr) * 2009-09-17 2011-03-17 Nuovo Pignone S.P.A. Soupape-champignon avec orifices de purge, et methode permettant de reduire la pression exercee sur eux
WO2013084063A1 (fr) * 2011-12-09 2013-06-13 Illinois Tool Works Inc. Clapet anti-retour
WO2016091484A1 (fr) * 2014-12-11 2016-06-16 Eagleburgmann Germany Gmbh & Co. Kg Soupape d'arrêt d'écoulement
US20160265720A1 (en) * 2015-03-13 2016-09-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Gas supply system, hydrogen station including the same, accumulator life judgement method, and use method of gas supply system
DE102016014312A1 (de) 2016-12-01 2018-06-07 Linde Aktiengesellschaft Strömungsoptimiertes Rückschlagventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256137A (en) * 1979-03-19 1981-03-17 Launay Paul De Check valve
GB2159248A (en) * 1984-05-23 1985-11-27 Bossini Bortolo & Figli Srl Non-return valve
CA2678983A1 (fr) * 2009-09-17 2011-03-17 Nuovo Pignone S.P.A. Soupape-champignon avec orifices de purge, et methode permettant de reduire la pression exercee sur eux
WO2013084063A1 (fr) * 2011-12-09 2013-06-13 Illinois Tool Works Inc. Clapet anti-retour
WO2016091484A1 (fr) * 2014-12-11 2016-06-16 Eagleburgmann Germany Gmbh & Co. Kg Soupape d'arrêt d'écoulement
US20160265720A1 (en) * 2015-03-13 2016-09-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Gas supply system, hydrogen station including the same, accumulator life judgement method, and use method of gas supply system
DE102016014312A1 (de) 2016-12-01 2018-06-07 Linde Aktiengesellschaft Strömungsoptimiertes Rückschlagventil

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